Is semen alive and does it has a spirit?

Question :

The spirit is blown into the fetus after four months; do we understand from this that the sperm that unites with the ovum, and from which the fetus develops, is not alive?

Answer:

Both man's sperm and a woman's ovum are alive with a life that is unique and suitable to them, as long as Allâh wills them to unite with each other. When this does occur, the fetus begins to develop by the will of Allah and it is alive, also with a life that is appropriate for it.

It is alive in that it grows and goes through its stages of development; when a spirit is blown into it, it is alive in another sense, also by the will of Allah, the All-Knower. As much as man strives to know, as much as skilled doctors and researchers study the stages of life in a mother's womb, their knowledge will never encompass the intricate details of childbearing and of the development of the fetus; they can only know that knowledge that they have been endowed with, which is at its best, limited. Allâh Almighty says:
"Allah knows what every female bears, and by how much the wombs fall short (of their time or number) or exceed. Everything with Him is in (due) proportion. All-Knower of the unseen and the seen, the Most Great, the Most High."

He also said:
"Verily, Allah! With Him (Alone) is the knowledge of the Hour, He sends down the rain, and knows that which is in the wombs."

Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 8 Pages 336-337